Weatherproof & heavy-duty: this outdoor string lights are ul listed weatherproof commercial. the insulation material can protect the strand from hot winter, sun, wind, rain, snow and damp. flexible heavy-duty cord withstands the wear of indoor and outdoor us dimmer compatible to set the right mood: for greater mood lighting flexibility and a soft glow, a dimmer switch to create the perfect atmosphere for a birthday party, family reunion, , or wedding reception. it adds flair to bistro deck porch patio garden backyard terrace pergola cafe restaurant malls for wedding bbq party banquets, also suitable for tree-lighting like christmas tree